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. 2002 Apr 30;99(10):7060–7065. doi: 10.1073/pnas.092071899

Figure 3.

Figure 3

Complementation behaviors of Tsr trimer contact mutants. Strains with a Tsr* plasmid and a compatible Tsr+ or Tar+ plasmid were tested for serine and aspartate chemotaxis on tryptone soft agar plates at different relative expression levels. Note the outer (serine) ring in colonies of “rescuable” mutants at 1:1 coexpression with wild-type Tar. Tsr* mutants shown in these examples: V384P (recessive); I377P (dominant); I377W (epistatic); R388A (recessive, rescuable); E385A (dominant, rescuable).